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The recent launch of Fermi / GLAST - coinciding with the MAXI workshop -opens a new era for studies of jet-dominated active galaxies, known as blazars.While the emission processes operating in various spectral bands in blazars arereasonably well understood, the knowledge of the details of the structure ofthe jet, location of the dissipation region with respect to the accreting blackhole, and coupling of the jet to the accretion process are known only at arudimentary level. Blazars are variable, and this provides an opportunity touse the variability in various bands - and in particular, the relationship ofrespective time series to each other - to explore the relative location ofregions responsible for emission in the respective bands. Observationally, thisrequires well-sampled time series in as many spectral bands as possible. Tothis end, with its all-sky, sensitive monitoring capability, the recentlylaunched GLAST, and MAXI, to be deployed in 2009, are the most promisinginstruments bound to provide good sampling in respectively the energeticgamma-ray, and the soft X-ray band. This paper highlights the inferencesregarding blazar jets that can be gleaned from such joint observations.

MAXI and GLAST Studies of Jets in Active Galaxies